@@ -825,7 +825,7 @@ Reader_iternext(ReaderObj *self)
             if (c == '\0') {
                 Py_DECREF(lineobj);
                 PyErr_Format(_csvstate_global->error_obj,
-                             "line contains NULL byte");
+                             "line contains NUL");
                 goto err;
             }
             if (parse_process_char(self, c) < 0) {
Original file line number	Diff line number	Diff line change
`@@ -825,7 +825,7 @@ Reader_iternext(ReaderObj *self)`
`825`	`825`	`if (c == '\0') {`
`826`	`826`	`Py_DECREF(lineobj);`
`827`	`827`	`PyErr_Format(_csvstate_global->error_obj,`
`828`		`- "line contains NULL byte");`
	`828`	`+ "line contains NUL");`
`829`	`829`	`goto err;`
`830`	`830`	`}`
`831`	`831`	`if (parse_process_char(self, c) < 0) {`